3G-Access-Point with ZD1211 - Problem: rfkill

Hoi,I am trying to set up the Pi as an wifi access point providing internet access to all connected devices via a 3G USB Modem. For the wifi I have a ZyDAS ZD1211B 802.11g usb dongle (Vunex Wifi Walker). 3G will be provided by: ZTE WCDMA Technologies MSM MF627/MF628/MF628+/MF636+ HSDPA/HSUPA.My problem: hostapd is not starting, the error seems to be:

I'm fiddling with my wifi connection, and found that rfkill is not really necessary. I suppose it is for devices that have the resources to stop all RF activity when needed. Like Notebooks, where you usually have at least a combination of buttons or a hardware switch. RasPi obviously does not have anything like this by default (perhaps you can make one with using GPIO and some code). You can install rfkill, but it won't find any device.

The problem must be something else, the lack of rfkill devices do not prevent proper connections. It should be something else, check the logs.